Re: [RFC][PATCH 4/7] sched: Replace sd_busy/nr_busy_cpus with sched_domain_shared

[Peter Zijlstra]

On Mon, May 16, 2016 at 04:31:08PM +0100, Dietmar Eggemann wrote:
> On 09/05/16 11:48, Peter Zijlstra wrote:
> 
> Couldn't you just always access sd->shared via
> sd = rcu_dereference(per_cpu(sd_llc, cpu)) for
> updating nr_busy_cpus?

Sure; but why would I want to add that extra dereference? Note that in
the next patch I add more users of sd_llc_shared.